Norwegen: „In 2015, a regulation capping the maximum annual fee for ECEC participation at not more than 6 % of the family income was introduced. In addition, children aged 4 and 5 were given the right to 20 free hours of preschool per week, a measure extended to 3 year-old one year later. […] Preliminary findings on Norway indicate that the availability of 20 hours of free pre-schooling increased the participation of minority-language children by 15 %, leading to better results on mapping tests in the first and second grade compared to areas with no intervention (i.e. no free preschool hours allocation).“
OECD (Hrsg.), Changing the Odds for Vulnerable Children (2019), S. 117.